The EL150K1 Liquid Level Swichgage® instrument is a combination liquid level gauge and low limit switch. It can be used to monitor lube oil, hydraulic fluid or diesel fuel reservoirs and activate alarms and/or shut-down at a predetermined minimum level.

The L129 Lube Level Swichgage® instrument is a combination lube level indicating gage and adjustable low and high limit switch. It provides protection against low oil level or high level caused by overfill or fuel or water seepage into the crankcase.